or映射中助手类的代码是什么呢？

private static final SessionFactory sessionFactory=buildSessionFactory))
private static SessionFactory buildSessionFactory(){// A SessionFactory is set up once for an application!
final StandardServiceRegistry registry=new StandardServiceRegistryBuilder()
.configure()// configures settings from hibernatecfg.xml.build(); try {
return new MetadataSources(registry)buildMetadata()buildSessionFactory()}catch (Exception e){
//The registry would be destroyed by the SessionFactory,but we had trouble building the SessionFactory// so destroy it manually.
StandardServiceRegistryBuilder.destroy(registry) throw new ExceptionInInitializerError(e);}
}
public static SessionFactory getSessionFactory(){ return sessionFactory;
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